Method and means for making artificial-stone products



A. CROOK AND R. D, CHAPMAN.

METHOD AND MEANS FOR MAKING ARTIFICIAL STONE PRODUCTS.

APPLICATION FILED APR. 11, 1919.

1 46 ,638. Patented July 13,1920.

' u/e lz$alks 09665 Cro 0/2: Picard .D. Cid 077 l?- ALFRED CROOK ANDRICHARD D. CHAPMAN, OF PHILADELPHIA, PENNSYLVANIA;

ASSIGNOBS TO TAYLOR- WHARTON IRON AND STEEL COMPANY, OF HIGH BRIDGE,

NEW JERSEY, A CORPORATION OF NEW JERSEY.

METHOD AND MEANS FOR MAKING ARTIFICIAL-STONE PRODUCTS.

Application filed April 11,

To all who/nit may concern:

Be it known that we, ALFRED CnooK lticimno I). CHAPMAN citizens of theUnited States, residing at Philadelphia, in the county of Philadelphiaand State of Pennsylvania, have invented certain new and usefulImprovements in Methods and Means for Making Artificial-Stone Products,of which the followin is a specification.

Artificial stone s abs or plates for use as shingles and the like andcomposed of asbestos and a binder, such as hydraulic cement set inwater, have heretofore and before our invention been made in variousways, but principally by the so-called cardboard machine method and bypressing in molds. The resultant products are fairly good, butthemethods are both crude and costly.

It has also been proposed and attempts have been made to produce theslabs, plates or shingles through the agency of squeezing rolls. in thistype of machine the material was deposited upon the apron or carrier ina ready-mixed plastic state, or the asbestos and cement materials,separately or comingled, were laid and then-sprayed with water. Suchmethods as well as the machines for carrying them into efiect haveproven commercially unsatisfactory and the products thereof are of veryinferior quality. The principal object of our invention is to provide amethod and means for rapidly and economically forming from artificialstone material, slabs, sheets, plates, or other objects, for use aswater and fire-proof root- 111 wall and ceiling panels, and the like.

enerally stated, the method consists in projecting under considerableforce or pressure, onto an upwardly traveling inclined belt or apron, acontinuous or constant stream or jet of divided asbestos material,hydraulic cement or other suitable binder with or without a retarder,and water, whereby to complete the mixing initiallystarted in the streamand to cause the mixture to spread, level or gage itself autornatically,in which state it is rapidly advanced to and acted upon by pressurerolls, any excess fluid operating to run down the apron into a suitablecollector. The asbestos and cement may be applied separately or they maybe first ctr-mingled and then 1mand Specification of Letters Patent.Patented July 13, 1920,

1919. SerillNO. 289,346.

upon.

Referring to the drawings forming a part hereof Figure 1 shows thegeneral arrangement of apparatus for carrying the invention inte edect.

Fig. 2 is a face view of the carrier or apron showing how the charge isautomatically spread or leveled.

Fig. 3 illustrates interlaced or loose woven asbestos.

Fig. a illustrates a woven wire frame or matrix.

in the drawings, the numeral 5 indicates an apron or carrier, which isoperated preterably at high speed in any appropriate manner. The apronis inclined from the perpendicular and travels upwardly carrying thecharge to appropriate pressure provisions indicated at 6. As illustratedin Fig. 1 the charge is delivered to the belt or apron in the form of acontinuous jet or stream which is under considerable head or pressure.This may be accomplished, for example, by the gun indicated at 7. Theingredients, asbestos and cement, may be impelled and rendered plasticby water or Wet steam, under pressure, or a ready-mixed more or lessfluid or plastic charge may be forcibly projected by pneumatic power.Wet steam is advantageous because it acts with more celerity than waterin permeating and wetting the inherently dry ingre dients and because itobviates a dust-laden atmosphere.

We may, in lieu of mixing the asbestos material in a divided state,employ a fabric matrix or core in the form of a loose woven orinterlaced sheet 8 of asbestos, as illustrated in Fig. 3. In practicethis islsu erposed on and carried along with the elt 5 and charged with;gement of proper fluid v a e. or plestic consistency, sometimes lid lltl

till

ploy z, 7 t such the woven structaste 9, l.

'lllre'wet mixing of the ingredients is ini tislly stsrted in the streamranging from the gun to the apron and quickly concluded on impact. Thetorce cl impact together with the opposing forces oil rcuit}! and the upword lift or thrust of t' e opron operate to eutomaticolly spread theroster-is}. which surges toward the sides substantially in the mannerindicsted in Fig. 2 so that when itresches the pressure rolls it issubstantislly uniformly gsged or leveled collector 10 in proximity withthe lower end of the apron operates to arrest and lead owsyany excessfluid.

While we hove specifically referred to asbestos and hydraulic cement, itwill of course be understood that the invention conteinplates anyartificial stone materiel or combinution of rnziteiinls Which may beapplied and fabricated in the manner hereinbetore enlarged upon.

Having described the object sud nature of the invention, We clsirn:--

l. The method herein-described, which consists in subjecting o mixtureof srtiiicinl stone materiel to the impelling force of u, blast,completing. the mixing of such insterisl by impact, end thereaftercompacting it under pressure.

2. The method herein-described, which consists in subjecting s mixtureof urtiticisl stone material to the impelling force of e blast,completing the mixing and nutornsticnlly spreading the material byimpact with n mobile surtnce, and subjecting it to exerted pressure. v

3. 'lllie method herein-described, which consists in subjecting smixture of artificial stone materiel tothe impellinc force of s.

blnst, completing the mining cl such rusterinl by impact with o repidlymoving apron crossing the-path of the jet or blsst, and

then subjecting it to exerted pressure.

at. lhe method hereiudescribed, which consists in subjectingg e mixtureof artificial stone material to the impelling force oi in blast,completing the mixing oi such insteriel by impact with n rspidly movingspree crossing the peth of the jet or blast, and intposed elements toexerted pressure.

ti. The method heseintlesccibed, which consists in subjecting s mixtui'eof srtificisl stone meteiiel to the impelling force of o blast,completing the mixing oi such insteriol by impact with e loose Woven orinterlaced-sheet of asbestos, end subjecting said sheet and mixture toexerted pressure.

U The method herein-described, which consists in subjectin a, mixture otartificial stone rneterisl to vioent impact one rspidly driven upwordlytraveling inclined support, 'wlieiceby the mixing is completed and thematerial is suostentislly gnged or leveled, end then subjecting it topressure.

8. The method herein-described, which consists in subjecting econtinuous charge of artificial stone msterisl to violent impact on ezrspidly driven upwardly trs'veling inclined support, whereby the mixingis completed end the materiel is substantially gsged or leveled, endthen passing it tlirou h pressure rolls.

9. he method herein-described, which consists in subjecting s more orless fluid 0E plastic mixture of artificial stone material to theinipelling force e blast, in directing blest against surt'sce of si'spidly driven upweifdly tisveling apron, whereby the mistui'e issubstsntielly gag-eel or leveled end relieved of excess moisture, andthen pessin the mixture through piessure rolls.

l0. Appsretus for the purpose stated, comprising the conibinntion ot' einpidly driven upwardly tmveling inclined belt or npi'on, uiesnssupplying it with as con tinuouscherge of plastic inctesiel, endpressuse rolls opesetively disposed Wits :elstion to the spion.

in testimony Wlieieoi We our signs tures,

FRED CRU'OK. lltl CHAPMAN.

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